CN108572249A - A kind of evaluation method of the cold recycled asphalt mixture performance of solvent pitch - Google Patents
A kind of evaluation method of the cold recycled asphalt mixture performance of solvent pitch Download PDFInfo
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- CN108572249A CN108572249A CN201810425324.8A CN201810425324A CN108572249A CN 108572249 A CN108572249 A CN 108572249A CN 201810425324 A CN201810425324 A CN 201810425324A CN 108572249 A CN108572249 A CN 108572249A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/42—Road-making materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The present invention relates to a kind of evaluation methods of the cold recycled asphalt mixture performance of solvent pitch, include the following steps：Organic solvent is mixed with asphalt；Gathering materials for waste asphalt mixture is detached；To the progress mix-design that gathers materials extracted；Solvent cold asphalt rehabilitation mix proportion design；The molding and health of test specimen are carried out according to designed grading；The compound test specimen for being molded good with health is tested for the property.The present invention carries out regeneration as binder using solvent pitch to old material RAP.Waste and old asphalt pavement material is mixed and stirred with the solvent pitch especially prepared at normal temperatures.Using its distinctive specimen molding and Curing Method.Its old material mixture proportion and cold recycled asphalt mixture pavement performance can be improved.Reference is provided by the cold recycling technology of abundant asphalt, and to the research of solvent asphalt-regenerating mixture from now on and application, is a kind of method of evaluating performance effectively mixed to solvent cold asphalt rehabilitation.
Description
Technical field
The invention belongs to road pavement plane materiel material and its processing preparing technical fields, are related to a kind of cold renewal of solvent pitch
The evaluation method of performance of asphalt mixture.
Background technology
The design life of bituminous paving is generally 10 years or so, that is to say, that will have about 10% bituminous paving every year
Into conserving or rebuilding the period, annual resulting waste asphalt pavement material is up to tons up to a million.Urban road and public affairs
Road produces a large amount of waste asphalt mixtures (RAP) in maintenance, repair and transformation process, if not efficiently used, not only
The significant wastage of resource is caused, and will be polluted the environment.If can be being carried out after these waste asphalt pavement material recoveries
Recycling utilization will save the Master Cost of at least several hundred million members every year, and with the continuous construction of infrastructure, this number
According to also constantly increasing with every year about 15% speed.
Although hot in-place recycling effectively can realize that regeneration, old material mix ratio are low to asphalt.Closely
Nian Lai, cold recycling technology has obtained large development in China, but most of researchs and application are main using emulsified asphalt, modified milk
Change pitch or foamed asphalt as binder, although old material can be utilized at high proportion, its performance is poor, and hot recycling is not achieved
Performance requirement is only used for base or cutting optimal.
A kind of Cold Recycled Mixture with Emulsified Asphalt that the patent of invention that number of patent application is 201410532289.1 discloses
Early stage method for estimating stability, it is characterised in that include the following steps：(1) molding rut test piece and health, (2) carry out track examination
It tests, (3) are molded gyratory compaction test specimen, the test specimen health of (4) gyratory compaction, (5) brush experiment, (6) early stage judgement of stability.Track
It tests dynamic stability DS and is more than 1000 times/mm, when mass loss V is less than 2%, mixture early stage qualified stability.The present invention carries
The test method of confession can effectively determine Cold Recycled Mixture with Emulsified Asphalt early stage stability, with judge whether can not close traffic
Health and be directly open to traffic, but the patent judges merely Cold Recycled Mixture with Emulsified Asphalt stability in terms of track, not enough entirely
Face, convincingness be not strong.
Invention content
For overcome the deficiencies in the prior art, the present invention provides a kind of cold recycled asphalt mixture performance of solvent pitch
Evaluation method.The solvent pitch reclaimed asphalt mixture of the present invention is to prepare waste asphalt pavement material with special at normal temperatures
Solvent asphalt mixing and construction a kind of novel pavement material.Use developed solvent pitch as binder to old material
RAP carries out regeneration, improves the pavement performance of old material mixture proportion and cold recycled asphalt mixture, mixture proportion is by original
30% is increased to 50%.
The present invention provides the following technical solutions：
A kind of evaluation method of the cold recycled asphalt mixture performance of solvent pitch includes following step according to sequencing
Suddenly：
Step 1：Organic solvent and asphalt are mixed with solvent pitch；
Step 2：Gathering materials for waste asphalt mixture is detached；
Step 3：To the progress mix-design that gathers materials extracted；
Step 4：Solvent cold asphalt rehabilitation mix proportion design；
Step 5：The molding and health of test specimen are carried out according to designed grading；
Step 6：The compound test specimen for being molded good with health is tested for the property.
Preferably, in step 1, the organic solvent can volatilize and form hyrate with the substance in air.It is above-mentioned
Either a program is preferably, and the solvent pitch is bioactivator, is to have surface-active by what microorganism or plant generated
The metabolite of ability.The molecular structure of the material is mainly made of the hydrocarbon chain of hydrophilic polar group and hydrophobic oleophilic oil non-
Polarity forms.
Any of the above-described scheme is preferably, and in the solvent type pitch, organic solvent content accounts for 56%, asphalt content
Account for 44%.
Any of the above-described scheme is preferably, and in step 3, formate gradation composition curve is above and below old asphalt mixture grading
Between limit.
Any of the above-described scheme is preferably, in step 4, solvent asphalt content ranging from 7.5%-9.5%.
Any of the above-described scheme is preferably, and in step 4, solvent asphalt content is 7.5%.
Any of the above-described scheme is preferably, and in step 4, solvent asphalt content is 8%.
Any of the above-described scheme is preferably, and in step 4, solvent asphalt content is 8.5%.
Any of the above-described scheme is preferably, and in step 4, solvent asphalt content is 9%.
Any of the above-described scheme is preferably, and in step 4, solvent asphalt content is 9.5%.
Any of the above-described scheme is preferably, and in step 5, the molding includes the following steps with health-preserving method：
(1), after shaping test piece, two-sided to hit real equivalent multiple；
(2), by test specimen High-temperature Curing in an oven；
(3), by the complete test specimen of health, two-sided again to hit real equivalent multiple；
(4), test specimen is placed to a period of time at room temperature；
(5), test specimen is put into health in thermostatic water bath；
(6), the test specimen good to health carries out performance detection.
Any of the above-described scheme is preferably, and hits real method shaping test piece using Marshall is secondary in step (1), two-sided to hit reality
50 times.
Any of the above-described scheme is preferably, in step (2) by test specimen 110 DEG C the health of baking oven high temperature for 24 hours.
Any of the above-described scheme is preferably, and in step (3), is hit the complete test specimen of health is two-sided again real 25 times.
Any of the above-described scheme is preferably, and in step (4), test specimen is placed at room temperature together with die trial while placing one section
Time.
Any of the above-described scheme is preferably, and in step (4), test specimen is placed for 24 hours at room temperature together with die trial.
Any of the above-described scheme is preferably, and further includes demoulding the time after step (4).
Any of the above-described scheme is preferably, and test specimen is put into health 30min in 60 DEG C of thermostatic water baths in step (5).
Any of the above-described scheme is preferably, and performance detection includes at least water stability, high-temperature behavior, low temperature in step (6)
The detection of performance.
Advantageous effect：The present invention provides a kind of evaluation method of the cold recycled asphalt mixture performance to solvent pitch, adopts
Developed solvent pitch is used to carry out regeneration to old material RAP as binder.At normal temperatures by waste and old asphalt road plane materiel
Material is mixed and stirred with the solvent pitch especially prepared, energy conservation and environmental protection.Using its distinctive specimen molding and Curing Method.It is old that its can be improved
Expect mixture proportion and cold recycled asphalt mixture pavement performance.Solvent type asphalt intensity in early stage is higher simultaneously, can
To come into operation faster.The popularization and application of solvent type asphalt are and right by the cold recycling technology of abundant asphalt
The research of solvent asphalt-regenerating mixture from now on provides reference with application, while this patent is different using solvent pitch as binder
In emulsified asphalt, stability is more preferable.Performance for evaluating cold recycled asphalt mixture is more stablized, and is a kind of effective right
The method of evaluating performance of solvent cold asphalt rehabilitation mixing.
Specific implementation mode
In order to further appreciate that the technical characteristic of the present invention, the present invention is explained in detail with reference to specific embodiment
It states.Embodiment only has illustrative effect to the present invention, without the effect of any restrictions, those skilled in the art
The modification for any unsubstantiality made on the basis of the present invention should all belong to the scope of protection of the present invention.
Cold renewal is carried out to waste asphalt mixture as binder using solvent pitch, includes molding to test specimen and supports
The performance evaluation of generation method and solvent cold asphalt rehabilitation mixture.
A kind of method of the evaluation of the cold recycled asphalt mixture performance of solvent pitch：
Step 1：Solvent pitch is developed, solvent pitch is bioactivator, is to have table by what microorganism or plant generated
The metabolite of face activity is the metabolite with interfacial energy generated by microorganism or plant.It will be organic molten
Agent mixes with solvent pitch and obtains solvent pitch, and wherein organic solvent content accounts for 56%, and solvent bitumen content accounts for 44%.
The organic solvent used be different from using petroleum solvents prepare liquid asphalt, can volatilize and in air
Substance forms hyrate, does not pollute the environment.
Step 2：Gathering materials for RAP is detached using centrifugation extraction device and Abson method.
Step 3：Gather materials using marshall compaction method progress mix-design is corrected, as shown in table 1 what is extracted.
In step 3, formate gradation composition takes parameter on trendline should be between the bound that design level is matched.The grading area of each grade of sieve pore
Between as shown in table 1.
Step 4：Solvent cold asphalt rehabilitation mix proportion design.Solvent asphalt content is 7.5%-9.5%.
Step 5：The molding and health of test specimen are carried out according to designed grading.
Above-mentioned molding is mainly included the following steps that with health-preserving method：
1) use Marshall is secondary to hit real method shaping test piece, it is two-sided hit it is 50 times real.
2) by test specimen 110 DEG C the health of baking oven high temperature for 24 hours.
3) it hits the complete test specimen of health is two-sided again real 25 times.
4) test specimen is placed for 24 hours at room temperature together with die trial.
5) test specimen is demoulded.
6) test specimen is put into health 30min in 60 DEG C of thermostatic water baths.
Step 6：It is steady to the mixture progress water for being molded good with health according to the method described above, high temperature, the inspection of cryogenic property
It surveys.Method detailed is as follows：
(1) gathering materials in RAP is detached using centrifugation extraction device and Abson method.By screening result and AC-13
Grading limit is compared, and designs formate gradation composition, and according to Marshall compaction method is corrected, RAP's gathers materials the method that design level is matched
Grading is as shown in table 1.
The aggregate grading of 1 RAP of table
(2) molding of solvent cold asphalt rehabilitation compound test specimen uses the secondary compacting process of Marshall, i.e., first two-sided to hit real 50
It is secondary, 110 DEG C of baking oven high temperature healths take out for 24 hours, after health it is two-sided hit real 25 times, take out and two-sided hit again after health
It is 25 times real, then placed in the greenhouse for 24 hours together with die trial, health 30min, progress Marshall examination in 60 DEG C of thermostatic water baths after demoulding
It tests.
(3) 7.5%, 8.0%, 8.5%, 9% is added respectively in waste asphalt mixture, 9.5% (correct) is above-mentioned
Modification whether correct solvent pitch, by upper
The method molding marshal piece stated, measures the mechanics and volume index of cold regeneration mix, as shown in table 2.
The mechanics and volume index of 2 cold regeneration mix of table
(4) according to molding Marshall stability, bulk density first increases and subtracts afterwards, and solvent asphalt content is reached at 9%
To maximum value；Void in mineral aggregate first subtracts and increases afterwards；Effective bitumen saturation degree, flow valuve increase, and porosity is reduced.According to it is a series of because
Element determines that asphalt optimum content is 9%.
(5) with reference to hot-mix asphalt mixture pavement performance evaluation method, according to identified solvent type asphalt content, to molten
Agent pitch asphalt-regenerating mixture has carried out residual Marshall Test, indirect tensile test on frozen-thaw, wheel tracking test and the small beam deflection of low temperature
Experiment.
(6) water stabilizing
Immersion Marshall test result and indirect tensile test on frozen-thaw result difference are as shown in Table 3 and Table 4.
3 immersion Marshall test result of table
4 indirect tensile test on frozen-thaw result of table
(7) high-temperature behavior
The results are shown in Table 5 for wheel tracking test：
5 wheel tracking test result of table
(8) cold regeneration mix cryogenic property
The results are shown in Table 6 for girder bend test：
6 girder bend test result of table
Conclusion：From test result it is found that solvent pitch is as a kind of novel asphalt material, in the use of optimum solvent pitch
Under amount (solvent asphalt content is 9%), it is water stability, high-temperature stability that regenerating mixture, which has excellent,.
The method of the Study on performance evaluation of cold recycled mixture of the solvent pitch of the application, including to waste asphalt mixture
Cold renewal further include the cold renewal to solvent pitch to the specimen molding and health-preserving method of solvent cold asphalt rehabilitation mixture
The water stability of asphalt is evaluated, the high-temperature behavior evaluation of the cold recycled asphalt mixture of solvent pitch, solvent pitch
The cryogenic property of cold recycled asphalt mixture is evaluated.The present invention relates to the cold recycled asphalt mixture of solvent pitch be a kind of
As the Novel cold regeneration asphalt of road structure layer, performance of asphalt mixture is evaluated by above method, it can
Obtain corresponding test index：The novel dissolvent pitch that the set method is developed according to us, it is mixed by being different from traditional asphalt
Material specimen molding and health-preserving method are closed, the performance of mixture is evaluated from different pavement performance angles, and is given each
The recommended value of kind index request, is the cold recycled asphalt mixture evaluation method of a set of effective solvent pitch.
It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It is still
Either which part or all technical features can be carried out so that technical scheme described in the above embodiments is modified
Equivalent replacement；And these modifications or replacements, it does not separate the essence of the corresponding technical solution various embodiments of the present invention technical side
The range of case.
Claims (10)
1. a kind of evaluation method of the cold recycled asphalt mixture performance of solvent pitch, it is characterised in that：According to sequencing packet
Include following steps：
Step 1：Organic solvent and asphalt are mixed with solvent pitch；
Step 2：Gathering materials for waste asphalt mixture is detached；
Step 3：To the progress mix-design that gathers materials extracted；
Step 4：Solvent cold asphalt rehabilitation mix proportion design；
Step 5：The molding and health of test specimen are carried out according to designed grading；
Step 6：The compound test specimen for being molded good with health is tested for the property.
2. a kind of evaluation method of the cold recycled asphalt mixture performance of solvent pitch as described in claim 1, feature exist
In：In step 1, the solvent pitch is bioactivator.
3. a kind of evaluation method of the cold recycled asphalt mixture performance of solvent pitch as described in claim 1, feature exist
In：In step 4, solvent asphalt content ranging from 7.5%-9.5%.
4. a kind of evaluation method of the cold recycled asphalt mixture performance of solvent pitch as described in claim 1, feature exist
In：In step 5, the molding includes the following steps with health-preserving method：
（1）, after shaping test piece, it is two-sided that hit real equivalent multiple；
（2）, by test specimen High-temperature Curing in an oven；
（3）, by the complete test specimen of health, two-sided again to hit real equivalent multiple；
（4）, test specimen is placed to a period of time at room temperature；
（5）, test specimen is put into health in thermostatic water bath；
（6）, good to health test specimen carry out performance detection.
5. a kind of evaluation method of the cold recycled asphalt mixture performance of solvent pitch as claimed in claim 4, feature exist
In：Step（1）It is middle to hit real method shaping test piece using Marshall is secondary, it is two-sided hit it is 50 times real.
6. a kind of evaluation method of the cold recycled asphalt mixture performance of solvent pitch as claimed in claim 4, feature exist
In：Step（2）It is middle by test specimen 110 DEG C the health of baking oven high temperature for 24 hours.
7. a kind of evaluation method of the cold recycled asphalt mixture performance of solvent pitch as claimed in claim 4, feature exist
In：Step（3）In, it hits the complete test specimen of health is two-sided again real 25 times.
8. a kind of evaluation method of the cold recycled asphalt mixture performance of solvent pitch as claimed in claim 4, feature exist
In：Step（4）In, test specimen is placed for 24 hours at room temperature together with die trial.
9. a kind of evaluation method of the cold recycled asphalt mixture performance of solvent pitch as claimed in claim 4, feature exist
In：Step（5）It is middle that test specimen is put into health 30min in 60 DEG C of thermostatic water baths.
10. a kind of evaluation method of the cold recycled asphalt mixture performance of solvent pitch as claimed in claim 4, feature exist
In：Step（6）Middle performance detection includes at least the detection of water stability, high-temperature behavior, cryogenic property.
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Cited By (3)
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| CN111785338A (en) * | 2020-07-16 | 2020-10-16 | 山东交通学院 | Grading method, system, medium and equipment suitable for regenerated asphalt mixture |
| CN111983205A (en) * | 2020-07-24 | 2020-11-24 | 广西交投科技有限公司 | Castle rut test-based asphalt mixture rut-resistant design method |
| CN113336475A (en) * | 2021-05-29 | 2021-09-03 | 山东哈力克新材料科技有限公司 | Fog sealing layer material for road and preparation method thereof |
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| CN111983205A (en) * | 2020-07-24 | 2020-11-24 | 广西交投科技有限公司 | Castle rut test-based asphalt mixture rut-resistant design method |
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| CN113336475A (en) * | 2021-05-29 | 2021-09-03 | 山东哈力克新材料科技有限公司 | Fog sealing layer material for road and preparation method thereof |
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Application publication date: 20180925 |
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